It's hard for me to say where to go to get extra warmth if that is what you're looking for. In the Torii I might recommend trying older RCA 5U4G straight shouldered rectifiers for the Torii, as these are the warmest that I've found (and I like it warm). I also find RCA OA3 straight shouldered regulator tubes to add warmth. I haven't much experience with OC2 brands but a Raytheon pair that I have offers more "bloom" than an RCA pair, which is tighter and darker. In the CSP2+ I have found several 5Y3GT tubes to image more realistically than 5U4G types, and RCA and Tungsol (a new find thanks to Mike here on the board) to be warm and clear.

I'm using 6N1P input tubes though on Torii and CSP2+ so I'm not entirely sure that these tubes would offer the same characteristics with your input tubes, but I suspect they will act similarly.

Thank you guys so far!Synergy is what I have now, but I wonder can it go better and warmer There is so much tubes I have no experience with. If anyone have more good suggestions I should try, please let me know.

Thats a nice looking system. I`ve used 5AR4`s and 5R4GY`s (old mullard and b.plate RCA) for a GE 5u4 and prefer both and I suppose are warmer, or more full bodied. But then you have to balance out makes and models. There are some pretty expensive 5u4`s out there. And we have had good reviews here of the shuguang 274B ($15), which I have seen listed as a proper replacement. Is the rectifier the best place to start and then signal/power tubes.I guess it is. †edit..Sorry the 5AR4 goes in my minimax, dont think it`ll work in CSP2+I`m actually looking for 2 matched rectifiers for when my new Decware gear arrives. There was a nice pair went for £200 recently. ouch ! †:)

Interesting choices Ed...Thanks for the links...the RCA tubes eb seller doesn`t appearwhen I type in RCA 5u4, so I guess their are many such sellers.I nearly went for a pair of the slightly used ones but have a couple months to make a purchase. I`ve saved his page anyway.Must be fun when you have multiple decware amps to switch therecs around.Ps. I did a check and the 5AR4 will sub the 5u4so......thats - 5u4..5Y3GT...5R4GY...274B...5AR4...This is all relatively new to me...it`s like learning a new language. †8-)

Marky: new language for me also ..but oly in positive way. I allways try to find best components to my amp combinations, and after that if few of tubes(or any parts) are near to eachother I pick the best loking. For me I think also the appearance affects how you "hear" the sound. Now I change Psvane KT88 tubes to Fuller EL34G and try to burn them in. So I can give feedback later...

EdGuy, I watched your video and noticed a huge problem with your system. The aluminum chair from Restoration Hardware will compleatly ruin the sound of your stereo. Trust me, the best thing you can do is pack the chair up and send it to me for distruction. I will make sure that it won't cause you any more harm.

Kind of a paradox. The begining of the record track reminded me ofJoy Division..and the last thing they wanted was tomake you feel warm. Beauty in suffering. Long time ago now, but I still spin the old `Atmosphere`and `closer` as well as the double live album...Even now, to appreciate the music you feel a little cold.We lost a good`n there.